Perhaps you should try some spelling variations:
ve triet » va trien, su triet
van hanh » van thanh, ban hanh, van anh
cam thuc » am thuc, nam thuc, can thuc
sach ly » sach y, sach lo, sach ty
hanh va » hang va, hanh vi
cam thu » nam thu, cac thu, ca thu
su sach » so sach, vu sach
hieu va » lieu va, hieu qua
hieu ve » hieu van
nang xa » nang x, lang xa, nang ma
ly nang » ky nang, ly hang, ly vang
va ve » va de, va le, va vi

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 ly nang xa hoi. ((hieu ve) or (hieu va)) ((cam thuc) OR (cam thu)) van hanh va ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ly nang xa hoi. ((hieu ve) OR (hieu va)) ((cam thuc) OR (cam thu)) van hanh va ve triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ly nang xa hoi. ((hieu ve) or (hieu va)) ((cam thuc) OR (cam thu)) van hanh va ve triet*".