Perhaps you should try some spelling variations:
hoc thuc » hoc huu
te sach » toc sach
lai cua » dai cua, hai cua, lai chau
vai cua » dai cua, hai cua, bai cua
va hanh » van hanh, va thanh, va danh
sach tu » sach thu, cach tu, sach ty
co thuc » do thuc, co thua, mo thuc
hieu va » lieu va, hieu qua
cong xa » cong xay, cong xua, cong ha
tu cong » thu cong, te cong, tai cong

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 tu cong xa hoi. hieu va ((co thuc) or (hoc thuc)) va hanh ((vai cua) or (lai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach tu cong xa hoi. hieu va ((co thuc) OR (hoc thuc)) va hanh ((vai cua) OR (lai cua)) tre.
• Adding a wildcard symbol may retrieve word variants: te sach tu cong xa hoi. hieu va ((co thuc) or (hoc thuc)) va hanh ((vai cua) or (lai cua)) tre*.