Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
hanh sai » hanh san, hanh tai, danh sai
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 hanh » van hanh, va thanh, va danh
tuc va » thuc va, truc va, tuc xa
cua te » cua tu

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 hanh sai ((va triet) or (cua te))~.
• 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 hanh sai ((va triet) OR (cua te)).
• 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 hanh sai ((va triet) or (cua te))".
• Adding a wildcard symbol may retrieve word variants: te sach ((ky lang) OR (ky nang)) xa hoi. hieu van cam tuc va hanh sai ((va triet) or (cua te))*.