Perhaps you should try some spelling variations:
hanh thai » nhanh thai, hinh thai, hanh tai
su triet » su viet, su tien, ve triet
ky lang » ky nang, ky tang, tay lang
ky dang » ky nang, ky danh
hieu va » lieu va, hieu qua
va tham » van tham, va cham, va thanh
thai su » thai xu, tai su, thap su
te sac » te sach, te cac, te san
luc va » tuc va, loc va

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 ((ky lang) OR (ky dang)) xa hoi. hieu va tham ((luc va) or (duc va)) hanh thai su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ((ky lang) OR (ky dang)) xa hoi. hieu va tham ((luc va) OR (duc va)) hanh thai su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sac ((ky lang) OR (ky dang)) xa hoi. hieu va tham ((luc va) or (duc va)) hanh thai su triet".
• Adding a wildcard symbol may retrieve word variants: te sac ((ky lang) OR (ky dang)) xa hoi. hieu va tham ((luc va) or (duc va)) hanh thai su triet*.