Perhaps you should try some spelling variations:
hac nuoc » hoc nuoc, cac nuoc, phap nuoc
dang tri » dang thi, dung tri, dong tri
sach ky » sac ky, sach ty, sach kem
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
va dang » van dang, va nang, va lang
va hac » van hac, va khac, va cac
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: thuat ((sach ky) or (sach y)) nang xa hoi. hieu va hac nuoc va dang tri cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat ((sach ky) OR (sach y)) nang xa hoi. hieu va hac nuoc va dang tri cua te.
• Adding a wildcard symbol may retrieve word variants: thuat ((sach ky) or (sach y)) nang xa hoi. hieu va hac nuoc va dang tri cua te*.