Perhaps you should try some spelling variations:
thien van » thi van
hieu van » hieu va, lieu va, hieu ve
xay hanh » day nhanh, day thanh, xanh hanh
te sach » toc sach
sach ky » sac ky, sach y, sach ty
chat tu » nhat tu, chai tu, chay tu
hanh ca » hanh cac, hanh cat, hanh cua
dao tre » dao tru, dao tien

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 ky nang x ho. ((hieu van) or (thien van)) chat tu xay hanh ca dao tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang x ho. ((hieu van) OR (thien van)) chat tu xay hanh ca dao tre.
• Adding a wildcard symbol may retrieve word variants: te sach ky nang x ho. ((hieu van) or (thien van)) chat tu xay hanh ca dao tre*.