Perhaps you should try some spelling variations:
chet triet » chuyen triet, thuyet triet
thien van » thi van
thu sach » thuat sach, thuoc sach, thu hoach
hanh lam » thanh lap, hanh kem, hanh va
lam chet » lam chat, la chet, lam chu
tu sach » su sach, te sach, tu cach
cao hoi » cau hoi, co hoi, cao hoc
van bac » van ban, van bao, van hac
xac va » tac va, ac va, bac va

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) or (thu sach)) ky nang cao hoi. thien van bac ((xac va) or (duc va)) hanh lam chet triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ky nang cao hoi. thien van bac ((xac va) OR (duc va)) hanh lam chet triet.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu sach)) ky nang cao hoi. thien van bac ((xac va) or (duc va)) hanh lam chet triet*.