Perhaps you should try some spelling variations:
thuc van » thuc vat, thuc dan, thuc va
bo sach » co sach, hoc sach
nang xa » nang x, nang ma, mang xa
lang xa » lang ha, dang xay, lang van
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
duc van » duc va, duc tan, duc manh
vi cua » vai cua, di cua
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: bo sach y ((nang xa) or (lang xa)) hoi. hieu ve cham ((thuc van) or (duc van)) hanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: bo sach y ((nang xa) OR (lang xa)) hoi. hieu ve cham ((thuc van) OR (duc van)) hanh vi cua te.
• Adding a wildcard symbol may retrieve word variants: bo sach y ((nang xa) or (lang xa)) hoi. hieu ve cham ((thuc van) or (duc van)) hanh vi cua te*.