Perhaps you should try some spelling variations:
nham thuc » nhan thuc, nam thuc, nham thu
chau viet » khau viet, cham viet, chat viet
chu viet » che viet, khau viet, su viet
thu bang » thu ban, thu hang, chu bang
hanh lai » hanh lam, hanh tai, thanh lap
hieu van » thien van, lieu va, hieu ve
sach thu » sach thue, sach thieu, sach tham
va hanh » van hanh, va thanh, va danh
thuc va » thuc vat, thuc dan, thuc day
vu sach » vu bach, su sach, vu khach
hieu va » lieu va, hieu qua
bang x » nang x, bang _, bang 2
x hoi » xa hoi, o hoi, x ho

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach thu bang x hoi. ((hieu van) OR (hieu va)) nham thuc va hanh lai ((chau viet) or (chu viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach thu bang x hoi. ((hieu van) OR (hieu va)) nham thuc va hanh lai ((chau viet) OR (chu viet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach thu bang x hoi. ((hieu van) OR (hieu va)) nham thuc va hanh lai ((chau viet) or (chu viet))".
• Adding a wildcard symbol may retrieve word variants: vu sach thu bang x hoi. ((hieu van) OR (hieu va)) nham thuc va hanh lai ((chau viet) or (chu viet))*.