Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
duoc lam » duoc pham, duoc ly, duoc li
thanh ha » thanh hoa, thanh hai, nhanh ha
thanh ca » thanh cha, thanh cac, thanh va
cao hoi » cau hoi, co hoi, cao hoc
bo sach » co sach, hoc sach
sach v » sach va, sach y, sach 2
v nang » va nang, vu nang, van nang

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

• Performing a fuzzy search may retrieve terms with similar spellings: bo sach v nang cao hoi. hieu ((van lam) OR (van nam)) duoc lam ((thanh ca) or (thanh ha)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: bo sach v nang cao hoi. hieu ((van lam) OR (van nam)) duoc lam ((thanh ca) OR (thanh ha)) cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "bo sach v nang cao hoi. hieu ((van lam) OR (van nam)) duoc lam ((thanh ca) or (thanh ha)) cua triet".
• Adding a wildcard symbol may retrieve word variants: bo sach v nang cao hoi. hieu ((van lam) OR (van nam)) duoc lam ((thanh ca) or (thanh ha)) cua triet*.