Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
hanh vai » hanh vi, hanh va, hanh tai
vai cua » dai cua, hai cua, lai cua
va hanh » van hanh, va thanh, va danh
lam loc » lam duoc, lam ngoc
van lam » van nam
su sach » so sach
ky tang » ky nang, ky dang, kho tang
ky lang » ky nang, ky dang, tay lang
vu sach » vu bach, vu khach
loc va » hoc va, luc va
cua cu » cua chu, cua cau, cua su

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sach) or (vu sach)) ((ky lang) OR (ky tang)) xa hoi. hieu van lam loc va hanh vai cua cu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu sach)) ((ky lang) OR (ky tang)) xa hoi. hieu van lam loc va hanh vai cua cu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (vu sach)) ((ky lang) OR (ky tang)) xa hoi. hieu van lam loc va hanh vai cua cu".
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (vu sach)) ((ky lang) OR (ky tang)) xa hoi. hieu van lam loc va hanh vai cua cu*.