Perhaps you should try some spelling variations:
cam thue » cam thu, lam thue, nam thue
tang tai » hang tai, dung tai, sang tao
va triet » va thiet, va trien, ve triet
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
thue va » thuc va, thuyet va, thuc vat
va tang » va trang, van tang, ha tang
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
va cam » va cham, va cac, va cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach y nang xa hoi. hieu va cam thue va tang tai ((cua tre) or (va triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang xa hoi. hieu va cam thue va tang tai ((cua tre) OR (va triet)).
• Adding a wildcard symbol may retrieve word variants: tu sach y nang xa hoi. hieu va cam thue va tang tai ((cua tre) or (va triet))*.