Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
hieu van » thien van, lieu va, hieu ve
va thanh » gia thanh, ban thanh, va tinh
sach tu » sach thu, cach tu, sach ty
tu nang » tru nang, tu nong, tu nano
hieu va » lieu va, hieu qua
cam duc » cam xuc, cao duc, pham duc
vi cua » vai cua
di cua » dai cua, doi cua, de cua
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc sach tu nang x hoi. ((hieu van) or (hieu va)) cam duc va thanh ((vi cua) OR (di cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sach tu nang x hoi. ((hieu van) OR (hieu va)) cam duc va thanh ((vi cua) OR (di cua)) te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc sach tu nang x hoi. ((hieu van) or (hieu va)) cam duc va thanh ((vi cua) OR (di cua)) te".
• Adding a wildcard symbol may retrieve word variants: hoc sach tu nang x hoi. ((hieu van) or (hieu va)) cam duc va thanh ((vi cua) OR (di cua)) te*.