Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
hieu van » thien van, lieu va, hieu ve
ban hanh » ban hang
hanh lai » hanh lam, hanh tai, thanh lap
chau tho » chat thom, cau thi, cau tao
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
hieu va » lieu va, hieu qua
xuc ban » duc ban, cuc ban, quoc ban
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: thuat sach ty nang x hoi. ((hieu van) or (hieu va)) cam xuc ban hanh lai ((chau tho) OR (phu tho))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach ty nang x hoi. ((hieu van) OR (hieu va)) cam xuc ban hanh lai ((chau tho) OR (phu tho)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach ty nang x hoi. ((hieu van) or (hieu va)) cam xuc ban hanh lai ((chau tho) OR (phu tho))".
• Adding a wildcard symbol may retrieve word variants: thuat sach ty nang x hoi. ((hieu van) or (hieu va)) cam xuc ban hanh lai ((chau tho) OR (phu tho))*.