Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
danh vai » danh sai, danh va, doanh van
nang doc » nang luc
vai cua » dai cua, hai cua, lai cua
va danh » va dinh, va dan, va hanh
thuc va » thuc vat, thuc dan, thuc day
sach ty » sach y, sach tu, sach thu
te sach » toc sach
nang co » nang cao, nang noi, nang hoc
hieu va » hieu qua

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ty ((nang co) or (nang doc)) hoi. ((hieu va) OR (lieu va)) am thuc va danh vai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty ((nang co) OR (nang doc)) hoi. ((hieu va) OR (lieu va)) am thuc va danh vai cua triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty ((nang co) or (nang doc)) hoi. ((hieu va) OR (lieu va)) am thuc va danh vai cua triet*".