Perhaps you should try some spelling variations:
pham thuc » phap thuc, pham chuc, pham thu
nham thuc » nhan thuc, nam thuc, nham thu
sach thu » sach thue, sach thieu, sach tham
thu nang » thi nang, thu hang, thu bang
day hanh » day nhanh, day thanh, dao hanh
hanh lai » hanh lam, hanh tai, thanh lap
so sach » so sanh, bo sach, co sach
cao hoi » cau hoi, co hoi, cao hoc
hieu ve » hieu va, hieu van
lai cua » dai cua, hai cua, lai chau
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: so sach thu nang cao hoi. hieu ve ((pham thuc) OR (nham thuc)) day hanh lai cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach thu nang cao hoi. hieu ve ((pham thuc) OR (nham thuc)) day hanh lai cua te".
• Adding a wildcard symbol may retrieve word variants: so sach thu nang cao hoi. hieu ve ((pham thuc) OR (nham thuc)) day hanh lai cua te*.