Perhaps you should try some spelling variations:
hanh gian » thanh gian, thanh giang, manh giang
gian hoa » gian ha, gian hoi, gian thua
hieu van » hieu va, thien van, lieu va
va hanh » van hanh, va thanh, va danh
thuc va » thuc vat, thuc dan, thuc day
sach ty » sach y, sach tu, sach thu
te sach » toc sach
hieu ve » hieu va
ty nang » ky nang, ty xang, ty hang
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: te sach ty nang ((o hoi) or (xa hoi)). ((hieu ve) or (hieu van)) am thuc va hanh gian hoa viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty nang ((o hoi) OR (xa hoi)). ((hieu ve) OR (hieu van)) am thuc va hanh gian hoa viet.
• Adding a wildcard symbol may retrieve word variants: te sach ty nang ((o hoi) or (xa hoi)). ((hieu ve) or (hieu van)) am thuc va hanh gian hoa viet*.