Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh va, hanh tai
duc manh » suc manh, duc anh, duc minh
te sach » toc sach
va khac » va khao, va kha, vu khac
vai cua » dai cua, hai cua, lai cua
duc van » duc va, duc tan, duc phan
hieu va » lieu va, hieu qua
sach ty » sach y, sach tu, sach thu
tang ma » mang may, tang van
nang ma » sang ma, nang cao, mang may
cua tu » cua tuc, cua su, cua cu

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

• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty ((nang ma) OR (tang ma)) hoi. hieu va khac ((duc van) OR (duc manh)) hanh vai cua tu~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty ((nang ma) or (tang ma)) hoi. hieu va khac ((duc van) OR (duc manh)) hanh vai cua tu~".
• Adding a wildcard symbol may retrieve word variants: te sach ty ((nang ma) or (tang ma)) hoi. hieu va khac ((duc van) OR (duc manh)) hanh vai cua tu*.