Perhaps you should try some spelling variations:
cam thue » cam thu, nam thue, cam thiet
lam thue » nam thue, luat thue, lam thuoc
tang tai » hang tai, dung tai, sang tao
tai cua » thai cua, tai cuc, tri cua
va tang » va trang, van tang, ha tang
tu sach » thu sach, su sach, te sach
hieu va » lieu va, hieu qua
lang xa » lang ha, dang xay, lang van
nang xa » nang x, nang ma, mang 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: tu sach y ((nang xa) OR (lang xa)) hoi. hieu va ((cam thue) or (lam thue)) va tang tai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y ((nang xa) OR (lang xa)) hoi. hieu va ((cam thue) OR (lam thue)) va tang tai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y ((nang xa) OR (lang xa)) hoi. hieu va ((cam thue) or (lam thue)) va tang tai cua te".
• Adding a wildcard symbol may retrieve word variants: tu sach y ((nang xa) OR (lang xa)) hoi. hieu va ((cam thue) or (lam thue)) va tang tai cua te*.