Perhaps you should try some spelling variations:
thanh dat » thanh san, thanh hai, thanh van
sua viet » su viet, cua viet, lua viet
hanh tai » thanh tai, hang tai, han tai
sach ky » sac ky, sach y, sach ty
te sach » toc sach
hieu va » lieu va
tang xa » trang xa, tang ma, lang xa
ky tang » ky nang, ky dang, kho tang
cao suc » cao su, cao duc
suc va » duc va, tuc va, luc 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 sach ky tang xa hoi. ((hieu va) or (hieu qua)) cao suc va ((hanh tai) or (thanh dat)) sua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky tang xa hoi. ((hieu va) OR (hieu qua)) cao suc va ((hanh tai) OR (thanh dat)) sua viet.
• Adding a wildcard symbol may retrieve word variants: te sach ky tang xa hoi. ((hieu va) or (hieu qua)) cao suc va ((hanh tai) or (thanh dat)) sua viet*.