Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
lam truc » lam truoc, nam truc, lam thuoc
vu sach » vu bach, su sach, vu khach
nang ma » tang ma, sang ma, nang cao
van lam » van nam
truc va » thuc va, thuc vat, trung va
va hanh » van hanh, va thanh, va danh
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, xa hoi, ma hoa
vi cua » vai cua
di cua » doi cua, de cua, do cua

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

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