Perhaps you should try some spelling variations:
nham thuc » nhan thuc, nam thuc, nham thu
chau viet » chu viet, khau viet, cham viet
sach thu » sach thue, sach thieu, sach tham
thu nang » thi nang, thu hang, thu bang
hieu van » thien van, lieu va, hieu ve
hanh lai » hanh lam, hanh tai, thanh lap
vu sach » vu bach, su sach, vu khach
hieu va » lieu va, hieu qua
thuc va » thuc vat, thuc dan, thuc day
va hanh » van hanh, va thanh, va danh
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 nang x hoi. ((hieu van) OR (hieu va)) nham thuc va hanh lai chau viet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach thu nang x hoi. ((hieu van) OR (hieu va)) nham thuc va hanh lai chau viet".
• Adding a wildcard symbol may retrieve word variants: vu sach thu nang x hoi. ((hieu van) OR (hieu va)) nham thuc va hanh lai chau viet*.