Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
hanh sua » hinh su, hanh va, hanh tu
ve triet » va trien, su triet
su sach » so sach, vu sach
nang xa » lang xa, nang ma, mang xa
van cam » van nam, van lam, van cau
cam loc » cam lo
va hanh » van hanh, va thanh, va danh
loc va » hoc va, luc va
sua ve » su ve, sua va, cua ve

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 y ((nang xa) or (nang x)) hoi. hieu van cam loc va hanh sua ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y ((nang xa) OR (nang x)) hoi. hieu van cam loc va hanh sua ve triet.
• Adding a wildcard symbol may retrieve word variants: su sach y ((nang xa) or (nang x)) hoi. hieu van cam loc va hanh sua ve triet*.