Perhaps you should try some spelling variations:
cau trung » cau truong, cac trung, cao trung
cua viet » ca viet, hoa viet, cua vat
hanh vai » hanh vi, hanh va, hanh tai
trung va » truong va, trang va, trung ha
vai cua » dai cua, hai cua, lai cua
va hanh » van hanh, va thanh, va danh
tu sach » thu sach, su sach, tu cach
ly nang » ky nang, ly hang, ly vang
nang ma » tang ma, sang ma, nang cao
te sach » toc sach
hieu va » hieu qua
ma hoi » mai hoi, xa hoi, ma hoa

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 (te sach)) ly nang ma hoi. ((hieu va) or (lieu va)) cau trung va hanh vai cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) ly nang ma hoi. ((hieu va) OR (lieu va)) cau trung va hanh vai cua viet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (te sach)) ly nang ma hoi. ((hieu va) or (lieu va)) cau trung va hanh vai cua viet*".