Perhaps you should try some spelling variations:
thien van » thi van
hieu van » hieu va, lieu va, hieu ve
tu sach » thu sach, su sach, te sach
nang ma » tang ma, sang ma, nang cao
xa hanh » xa thanh, xa khanh, va hanh
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, xa hoi, ma hoa
nam te » nam tu, nam he, nam de
vi cua » vai cua, di cua
cua tu » cua tuc, cua su, cua cu
te xa » te va

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach y nang ma hoi. ((hieu van) or (thien van)) nam te xa hanh vi cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang ma hoi. ((hieu van) OR (thien van)) nam te xa hanh vi cua tu.
• Adding a wildcard symbol may retrieve word variants: tu sach y nang ma hoi. ((hieu van) or (thien van)) nam te xa hanh vi cua tu*.