Perhaps you should try some spelling variations:
thuat lanh » thuat lap
thuat san » thuat toan, thuat song, thuat xay
hieu van » hieu va, thien van, lieu va
cac tuc » cac toc, cac tac, cac nuoc
va hanh » van hanh, va thanh, va danh
hanh tu » anh tu, danh tu
cua tre » cua te, cuu tre, cua triet
cac tu » cac thu, cach tu, cac du
tu cua » hu cua, vu cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thuat san) or (thuat lanh)) ky nang x ho. hieu van ((cac tuc) OR (cac tu)) va hanh tu cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thuat san) OR (thuat lanh)) ky nang x ho. hieu van ((cac tuc) OR (cac tu)) va hanh tu cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thuat san) or (thuat lanh)) ky nang x ho. hieu van ((cac tuc) OR (cac tu)) va hanh tu cua tre".
• Adding a wildcard symbol may retrieve word variants: ((thuat san) or (thuat lanh)) ky nang x ho. hieu van ((cac tuc) OR (cac tu)) va hanh tu cua tre*.