Perhaps you should try some spelling variations:
cam thue » cam thu, lam thue, nam thue
tang tai » hang tai, dung tai, sang tao
tu sach » thu sach, su sach, te sach
hieu va » lieu va, hieu qua
thue da » thue dat, thue va, thu da
da tang » dam tang, da nang, ha tang
tai cua » thai cua, tai cuc, tri cua
y nang » ky nang, ly nang, v nang
va cam » va cham, va cac, va cao
cua te » cua tu
5 hoi » o hoi

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 ((5 hoi) or (xa hoi)). hieu va cam thue da tang tai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang ((5 hoi) OR (xa hoi)). hieu va cam thue da tang tai cua te.
• Adding a wildcard symbol may retrieve word variants: tu sach y nang ((5 hoi) or (xa hoi)). hieu va cam thue da tang tai cua te*.