Perhaps you should try some spelling variations:
dieu hien » dieu khien, dieu kien, bieu hien
bach tuoc » sach duoc, sach nuoc
hieu hien » bieu hien, chieu chien, dieu khien
cau treo » cau theo, cau tren, cau triet
va hang » van hang, va nang, va lang
tuoc va » thuoc va, nuoc va, duoc va
tu sach » thu sach, su sach, tu cach
nang xa » nang x, lang xa, nang ma
te sach » toc sach
va cau » van cau, va cac, va dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) or (te sach)) ky nang xa hoi. ((hieu hien) or (dieu hien)) bach tuoc va hang va cau treo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) ky nang xa hoi. ((hieu hien) OR (dieu hien)) bach tuoc va hang va cau treo.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (te sach)) ky nang xa hoi. ((hieu hien) or (dieu hien)) bach tuoc va hang va cau treo*.