Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
tu sach » thu sach, su sach, te sach
van lam » van nam
xuc van » luc van, vuc van, xuc ban
duc van » duc va, duc tan, duc manh
doi cua » dai cua, hoi cua
y nang » ky nang, ly nang, v nang
nang o » nang co, nang ho, nang ro
di cua » dai cua, de cua, do cua
o hoi » co hoi, o hoc, o hai

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 o hoi. hieu van lam ((xuc van) or (duc van)) hanh ((di cua) or (doi cua)) vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang o hoi. hieu van lam ((xuc van) OR (duc van)) hanh ((di cua) OR (doi cua)) vat.
• Adding a wildcard symbol may retrieve word variants: tu sach y nang o hoi. hieu van lam ((xuc van) or (duc van)) hanh ((di cua) or (doi cua)) vat*.