Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
cam truc » cau truc, nam truc, lam truoc
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
va hanh » van hanh, va thanh, va danh
te cac » tu cac, ve cac, te cao
ve cam » ve cham, ve cac, va cam
va han » va phan, van han, va hang
tai su » tai so, tai tu, lai su
te sac » te sach, te san

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sac) OR (te cac)) ky nang xa hoi. hieu ve cam truc ((va han) or (va hanh)) tai su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sac) OR (te cac)) ky nang xa hoi. hieu ve cam truc ((va han) OR (va hanh)) tai su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sac) OR (te cac)) ky nang xa hoi. hieu ve cam truc ((va han) or (va hanh)) tai su triet".
• Adding a wildcard symbol may retrieve word variants: ((te sac) OR (te cac)) ky nang xa hoi. hieu ve cam truc ((va han) or (va hanh)) tai su triet*.