Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
vu khach » vu khanh, vu khac, vay khach
lam loc » lam duoc, lam ngoc
vai cua » hai cua, lai cua, bai cua
va hanh » van hanh, va thanh, va danh
su sach » so sach, vu sach
van lam » van nam
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
loc va » hoc va, luc va

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