Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
tuc van » thuc van, truc van, tuc va
hieu ve » hieu va, hieu van
su sach » vu sach
nang xa » nang x, lang xa, nang ma
so sach » so sanh, bo sach, co sach
cam tuc » cam xuc, cam tu, nam thuc
ve cam » ve cham, ve cac, va cam
doi su » oi su, voi su
don su » dong su, down su, dan 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 (so sach)) ky nang xa hoi. hieu ve cam tuc van hanh ((doi su) OR (don su)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) ky nang xa hoi. hieu ve cam tuc van hanh ((doi su) OR (don su)) triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) or (so sach)) ky nang xa hoi. hieu ve cam tuc van hanh ((doi su) OR (don su)) triet*".