Perhaps you should try some spelling variations:
sach tay » sach hay, sach nay, sach tai
canh tay » canh tac, thanh tay, anh ta
lang van » dang van, tang van, hoang van
van dung » van dong, xay dung, tin dung
van hoi » van hoa, van hoc, van hoe
hieu va » lieu va, hieu qua
cac tu » cac thu, cach tu, cac du
tu van » tu va
cuc te » cua te, cuc thue, cuc tieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach tay) or (((xach tay) OR (canh tay)))) lang van hoi. hieu va cac tu van dung tai cuc te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach tay) OR (((xach tay) OR (canh tay)))) lang van hoi. hieu va cac tu van dung tai cuc te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach tay) or (((xach tay) OR (canh tay)))) lang van hoi. hieu va cac tu van dung tai cuc te*".