Perhaps you should try some spelling variations:
thanh gian » thanh giang, thach giang, thanh san
hieu viec » nhieu viec, hieu ve, sieu viet
dang xay » dang van, van xay
gian cua » gian xu, ban cua
va thanh » gia thanh, ban thanh, va tinh
viec cac » vien cac, viec cua, viec lam
cac luc » cau luc, coc luc, cac nuoc
sach ty » sach y, sach thu, xach tay
lang xa » lang ha, lang van
sach tu » sach thu, cach tu, sach uu
cua tre » cua te, cuu tre, cua triet
luc va » duc va, tuc va, loc va

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 ty) or (sach tu)) ((lang xa) or (dang xay)) hoi. hieu viec cac luc va thanh gian cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu ((sach ty) OR (sach tu)) ((lang xa) OR (dang xay)) hoi. hieu viec cac luc va thanh gian cua tre.
• Adding a wildcard symbol may retrieve word variants: vu ((sach ty) or (sach tu)) ((lang xa) or (dang xay)) hoi. hieu viec cac luc va thanh gian cua tre*.