Perhaps you should try some spelling variations:
thien van » thi van
tung dan » dung dan, huong dan, trung dai
nam thuc » nam thuoc, am thuc, nam thu
va triet » va thiet, va trien, ve triet
ky lang » ky nang, ky dang, tay lang
ky tang » ky nang, ky dang, kho tang
hang di » hang doi, hang dien, hang dich
hang vi » hang va, hanh vi, khang voi

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

• Performing a fuzzy search may retrieve terms with similar spellings: tung dan ((ky lang) OR (ky tang)) xa hoi. thien van nam thuc vat ((hang di) or (hang vi)) va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tung dan ((ky lang) OR (ky tang)) xa hoi. thien van nam thuc vat ((hang di) OR (hang vi)) va triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tung dan ((ky lang) OR (ky tang)) xa hoi. thien van nam thuc vat ((hang di) or (hang vi)) va triet".
• Adding a wildcard symbol may retrieve word variants: tung dan ((ky lang) OR (ky tang)) xa hoi. thien van nam thuc vat ((hang di) or (hang vi)) va triet*.