Perhaps you should try some spelling variations:
thuc van » thuc vat, thuc dan, thuc hanh
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
thuc va » thuc vat, thuc dan, thuc day
hang ki » hang di, hang ke, hang vi
su viet » so viet
sach v » sach va, sach y, sach 2
v nang » va nang, vu nang, van nang
ve cac » va cac, vien cac
ki su » ky su

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach v nang xa hoi. hieu ve cac ((thuc van) or (thuc va)) hang ki su viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach v nang xa hoi. hieu ve cac ((thuc van) OR (thuc va)) hang ki su viet.
• Adding a wildcard symbol may retrieve word variants: su sach v nang xa hoi. hieu ve cac ((thuc van) or (thuc va)) hang ki su viet*.