Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
lai cam » lai nam, lai tam, lai chau
lai cau » lai chau, loi cau, loai cay
va hanh » van hanh, va thanh, va danh
hac duc » hoc duc, ha duc, thach duc
tu sach » thu sach, su sach, tu cach
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
te sach » toc sach
van hac » van hoc, van ha, van 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) or (te sach)) ty nang xa hoi. hieu van hac duc va hanh ((lai cau) OR (lai cam)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) ty nang xa hoi. hieu van hac duc va hanh ((lai cau) OR (lai cam)) triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (te sach)) ty nang xa hoi. hieu van hac duc va hanh ((lai cau) OR (lai cam)) triet".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (te sach)) ty nang xa hoi. hieu van hac duc va hanh ((lai cau) OR (lai cam)) triet*.