Perhaps you should try some spelling variations:
hanh tri » thanh tri, hanh tai, hanh trinh
dua tren » dung tren
vu sach » vu bach, su sach, vu khach
sach tu » sach thu, cach tu, sach ty
hieu va » lieu va, hieu qua
tu ang » tu lang, tu anc, tu anh
ang xa » lang xa, mang xa, dang xay
loc va » hoc va, luc va
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: vu sach tu ang xa hoi. hieu va cac ((duc va) or (loc va)) hanh tri ((dua tren) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach tu ang xa hoi. hieu va cac ((duc va) OR (loc va)) hanh tri ((dua tren) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: vu sach tu ang xa hoi. hieu va cac ((duc va) or (loc va)) hanh tri ((dua tren) or (cua te))*.