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

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) OR (tu san)) ky dang 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) OR (tu san)) ky dang 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) OR (tu san)) ky dang ha hoi. hieu va ((cam tuc) or (nam thuc)) van dung tri cua tre*".