Perhaps you should try some spelling variations:
chat nuoc » nhat nuoc, khat nuoc, thoat nuoc
hanh lai » hanh lam, hanh tai, thanh lap
te sach » toc sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
cao hoi » cau hoi, co hoi, cao hoc
hieu va » lieu va
va hanh » van hanh, va thanh, va danh
cua tre » cuu tre, cua triet, dua tren
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: te sach ty nang cao hoi. ((hieu va) or (hieu qua)) chat nuoc va hanh lai ((cua tre) OR (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty nang cao hoi. ((hieu va) OR (hieu qua)) chat nuoc va hanh lai ((cua tre) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty nang cao hoi. ((hieu va) or (hieu qua)) chat nuoc va hanh lai ((cua tre) OR (cua te))".
• Adding a wildcard symbol may retrieve word variants: te sach ty nang cao hoi. ((hieu va) or (hieu qua)) chat nuoc va hanh lai ((cua tre) OR (cua te))*.