Perhaps you should try some spelling variations:
tang tai » hang tai, dung tai, sang tao
sach ky » sac ky, sach y, sach ty
thai va » thai van
va hang » van hang, va nang, va lang
su sach » so sach, vu sach
cam tuc » cam tu, nam thuc, dam thuc
hieu va » lieu va, hieu qua
tai hoi » tai khoi, dai hoi, tai hai
ky tang » ky nang, ky dang, kho tang
hai va » hai van, hoi va, mai va

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 ky tang tai hoi. hieu va ((cam tuc) or (cam xuc)) va hang ((hai va) OR (thai va)) trien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky tang tai hoi. hieu va ((cam tuc) OR (cam xuc)) va hang ((hai va) OR (thai va)) trien*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky tang tai hoi. hieu va ((cam tuc) or (cam xuc)) va hang ((hai va) OR (thai va)) trien*".