Perhaps you should try some spelling variations:
nam thuc » nam thuoc, am thuc, nam thu
dung tri » dung tai, dung tren, dung sai
van dung » van dong, xay dung, tin dung
cua tre » cua te, cuu tre, cua triet
ky dang » ky nang
ky danh » ky anh
hieu va » lieu va, hieu qua
cam tuc » cam xuc, cam tu, dam thuc
tu sac » tu sach, tu cac, tu san
ha hoi » hoa hoi, ha noi, xa hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ((ky dang) OR (ky danh)) ha hoi. hieu va ((cam tuc) or (nam thuc)) van dung tri cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ((ky dang) OR (ky danh)) ha hoi. hieu va ((cam tuc) OR (nam thuc)) van dung tri cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ((ky dang) OR (ky danh)) ha hoi. hieu va ((cam tuc) or (nam thuc)) van dung tri cua tre*".