Perhaps you should try some spelling variations:
hanh lai » hanh lam, hanh tai, thanh lap
hieu va » lieu va, hieu qua
lai cuu » lai cua, lai chau, lai cuoc
va hanh » van hanh, va thanh, va danh
cham lo » cham o, cam lo, cham soc
cuu tre » cua tre, cau tren, cau treo
sach ky » sac ky, sach ty, sach kem
hieu ve » hieu van
cao hoi » cau hoi, co hoi, cao hoc
lo va » lo van, lao va, ly va

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat ((sach ky) OR (sach y)) nang cao hoi. ((hieu ve) or (hieu va)) cham lo va hanh lai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat ((sach ky) OR (sach y)) nang cao hoi. ((hieu ve) OR (hieu va)) cham lo va hanh lai cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat ((sach ky) OR (sach y)) nang cao hoi. ((hieu ve) or (hieu va)) cham lo va hanh lai cuu tre".
• Adding a wildcard symbol may retrieve word variants: thuat ((sach ky) OR (sach y)) nang cao hoi. ((hieu ve) or (hieu va)) cham lo va hanh lai cuu tre*.