Perhaps you should try some spelling variations:
thien van » thi van
nang tai » hang tai, tang tai, sang tai
va triet » va thiet, va trien, ve triet
tai hai » thi hai, dai hai, tai ha
sach ky » sach y, sach ty, sach kem
nam tuc » nam thuc, nam truc, nam tu
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
sac ky » cac ky, sai ky
tuc va » thuc va, truc va, tuc xa

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat ((sach ky) OR (sac ky)) nang tai hai. thien van nam tuc va hanh vi ((cua tre) or (va triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat ((sach ky) OR (sac ky)) nang tai hai. thien van nam tuc va hanh vi ((cua tre) OR (va triet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat ((sach ky) OR (sac ky)) nang tai hai. thien van nam tuc va hanh vi ((cua tre) or (va triet))*".