Perhaps you should try some spelling variations:
pham thuc » pham chuc, nham thuc, pham thu
phap thuc » phap thu, phap hoc, phap tu
cua viet » ca viet, hoa viet, cua vat
thi nang » thi cong, ki nang, thi hanh
hang tai » hang va, dung tai
sach thi » sach thu, sach tai, sach thieu
tai cua » thai cua, tai cuc, tri cua
va hang » van hang, va nang, va lang
tu sach » thu sach, su sach, te sach
hieu va » lieu va, hieu qua
cua hoi » cua moi

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 thi nang ((cua hoi) or (xa hoi)). hieu va ((pham thuc) or (phap thuc)) va hang tai cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach thi nang ((cua hoi) OR (xa hoi)). hieu va ((pham thuc) OR (phap thuc)) va hang tai cua viet.
• Adding a wildcard symbol may retrieve word variants: tu sach thi nang ((cua hoi) or (xa hoi)). hieu va ((pham thuc) or (phap thuc)) va hang tai cua viet*.