Perhaps you should try some spelling variations:
hoc viet » hoc hien
nang xa » nang x, lang xa, nang ma
ve pham » v pham, ve phan, ve phat
sach 2 » sach y
sach v » sach va, sach y, sach vay
duy va » duy vat, duy van, day va
va dan » ca dan, va dao, va dau
dan du » dan dau, danh du, dan su
du hoc » tu hoc, duoc hoc

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu ((sach v) or (sach 2)) nang xa hoi. hieu ((ve pham) or (vi pham)) duy va dan du hoc viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((sach v) OR (sach 2)) nang xa hoi. hieu ((ve pham) OR (vi pham)) duy va dan du hoc viet.
• Adding a wildcard symbol may retrieve word variants: thu ((sach v) or (sach 2)) nang xa hoi. hieu ((ve pham) or (vi pham)) duy va dan du hoc viet*.