Perhaps you should try some spelling variations:
van thanh » van tuan
ban thanh » ban hanh, ban hang
hieu van » hieu va, thien van, lieu va
hoc sac » hoc sach, hoc cac, hoc mac
nang ma » tang ma, sang ma, nang cao
lam xuc » lam duoc
sac ky » cac ky, sai ky
ma hoi » mai hoi, xa hoi, ma hoa
cua tu » cua tuc, cua su, cua cu

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

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