Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
danh sai » dung sai, danh bat, danh dau
va triet » va thiet, va trien, ve triet
te sach » toc sach
ky lang » ky dang, ky tang, tay lang
van cam » van nam, van lam, van cau
cam tuc » cam xuc, cam tu, nam thuc
va danh » va dinh, va dan, va hanh
tuc va » thuc va, truc va, tuc xa
cua tu » cua tuc, cua su, cua cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ((ky lang) OR (ky nang)) xa hoi. hieu van cam tuc va danh sai ((va triet) or (cua tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((ky lang) OR (ky nang)) xa hoi. hieu van cam tuc va danh sai ((va triet) OR (cua tu)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((ky lang) OR (ky nang)) xa hoi. hieu van cam tuc va danh sai ((va triet) or (cua tu))".
• Adding a wildcard symbol may retrieve word variants: te sach ((ky lang) OR (ky nang)) xa hoi. hieu van cam tuc va danh sai ((va triet) or (cua tu))*.