Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
hanh doi » thanh doi, hanh noi, hang doi
ve triet » va trien, su triet
su sach » so sach, vu sach
ky tang » ky nang, ky dang, kho tang
tang xa » trang xa, tang ma, lang xa
ban duc » ban duoc, van duc, ban dac
va hanh » van hanh, va thanh, va danh
su sac » su cac, su xac
doi ve » moi ve, doi va, noi ve

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sac) or (su sach)) ky tang xa hoi. hieu van ban duc va hanh doi ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sac) OR (su sach)) ky tang xa hoi. hieu van ban duc va hanh doi ve triet.
• Adding a wildcard symbol may retrieve word variants: ((su sac) or (su sach)) ky tang xa hoi. hieu van ban duc va hanh doi ve triet*.