Perhaps you should try some spelling variations:
manh hanh » xanh hanh, danh thanh, minh thanh
van trieu » tan trieu, van tieu, van hieu
toc sach » hoc sach, doc sach, thuoc sach
hieu van » hieu va, thien van, hieu ve
duc manh » suc manh, duc anh, duc minh
va triet » va thiet, va trien, ve triet
sach tu » sach thu, cach tu, sach ty
cam duc » cam xuc, cao duc, pham duc
tu ang » tu lang, tu anc, tu anh
ang xa » lang xa, mang xa, dang xay

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach tu ang xa hoi. ((hieu van) or (lieu va)) cam duc manh hanh vi ((van trieu) or (va triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach tu ang xa hoi. ((hieu van) OR (lieu va)) cam duc manh hanh vi ((van trieu) OR (va triet)).
• Adding a wildcard symbol may retrieve word variants: toc sach tu ang xa hoi. ((hieu van) or (lieu va)) cam duc manh hanh vi ((van trieu) or (va triet))*.