Perhaps you should try some spelling variations:
thuat san » thuat toan, thuat song, thuat lanh
hoc sach » hoc sinh, hoc cac, hoc anh
van hanh » van thanh, ban hanh, van anh
ky dang » ky nang, ky danh
dang ma » dang mau, dang mam, dang mat
cac xuc » cac nuoc, chat xuc, cac cuoc
luu tre » luu tru, cuu tre, luy tre
ma hoi » mai hoi, xa hoi, ma hoa
vi luu » vi lua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc sach) or (thuat san)) ky dang ma hoi. hieu qua ((cac xuc) OR (cam xuc)) van hanh vi luu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc sach) OR (thuat san)) ky dang ma hoi. hieu qua ((cac xuc) OR (cam xuc)) van hanh vi luu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc sach) or (thuat san)) ky dang ma hoi. hieu qua ((cac xuc) OR (cam xuc)) van hanh vi luu tre".
• Adding a wildcard symbol may retrieve word variants: ((hoc sach) or (thuat san)) ky dang ma hoi. hieu qua ((cac xuc) OR (cam xuc)) van hanh vi luu tre*.