Perhaps you should try some spelling variations:
tham luc » than luc, tham nuoc, tham thuc
dai cuu » dai cua, dai huu
va hanh » van hanh, va thanh, va danh
va tham » van tham, va cham, va thanh
cuu tre » cua tre, cau tren, cau treo
ky tang » ky nang, ky dang, kho tang
ky lang » ky nang, ky dang, tay lang
va dan » ca dan, va dao, va dau
tu cam » tu cham, tu cac, tu nam

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu cam ((ky lang) OR (ky tang)) xa hoi. lieu va tham luc ((va hanh) or (va dan)) dai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cam ((ky lang) OR (ky tang)) xa hoi. lieu va tham luc ((va hanh) OR (va dan)) dai cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu cam ((ky lang) OR (ky tang)) xa hoi. lieu va tham luc ((va hanh) or (va dan)) dai cuu tre".
• Adding a wildcard symbol may retrieve word variants: tu cam ((ky lang) OR (ky tang)) xa hoi. lieu va tham luc ((va hanh) or (va dan)) dai cuu tre*.