Perhaps you should try some spelling variations:
thanh tai » thanh hai, thanh toan, doanh tai
toc sac » toc sach, toc san, hoc sach
truc va » thuc va, thuc vat, trung va
ky tang » ky nang, ky dang, kho tang
tang ma » mang may, tang van
tai cua » thai cua, tai cuc, tri cua
hieu va » lieu va
xuc va » duc va, tuc va, luc va
sac ky » cac ky, sai ky
ma hoi » mai hoi, xa hoi, ma hoa
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sac ky tang ma hoi. ((hieu va) OR (hieu qua)) cam ((xuc va) or (truc va)) thanh tai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sac ky tang ma hoi. ((hieu va) OR (hieu qua)) cam ((xuc va) OR (truc va)) thanh tai cua te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sac ky tang ma hoi. ((hieu va) OR (hieu qua)) cam ((xuc va) or (truc va)) thanh tai cua te*".