Perhaps you should try some spelling variations:
dang xay » dang van, van xay
hanh dai » hanh tai, hanh dao, vanh dai
te sach » toc sach
sach ty » sach y, sach tu, sach thu
lang xa » lang ha, lang van
qua cac » cua cac
cac hoc » cach hoc, cac hop, bac hoc
va hanh » van hanh, va thanh, va danh
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: te sach ty ((nang x) or (((lang xa) or (dang xay)))) hoi. hieu qua cac hoc va hanh dai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty ((nang x) OR (((lang xa) OR (dang xay)))) hoi. hieu qua cac hoc va hanh dai cua te.
• Adding a wildcard symbol may retrieve word variants: te sach ty ((nang x) or (((lang xa) or (dang xay)))) hoi. hieu qua cac hoc va hanh dai cua te*.