Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
nam thue » nam thu, nam thuc, lam thue
tang tai » hang tai, dung tai, sang tao
cam thue » cam thu, lam thue, cam thiet
ha tang » phap tang, cao tang, kho tang
ly nang » ky nang, ly hang, ly vang
mai hoi » mai khoi, dai hoi, lai hoi
hieu va » lieu va, hieu qua
y nang » ky nang, v nang, may nang
cuc te » cua te, cuc thue, cuc tieu

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

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