Perhaps you should try some spelling variations:
va trien » va truyen, va thiet, va tuyen
ky trang » ke trang, ky trong, ky tang
trang xa » trang va, trang ha, trong xa
nam thuc » nam thuoc, am thuc, nam thu
cam tuc » cam xuc, cam tu, dam thuc
hanh ve » hanh vi, hanh va, hanh kem
va hanh » van hanh, va thanh, va danh
hieu va » lieu va, hieu qua
te sai » te tai, te bai, te hai
te lai » te tai, te bai
ve va » ve van, te va, ke va

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sai) OR (te lai)) ky trang xa hoi. hieu va ((cam tuc) or (nam thuc)) va hanh ve va trien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sai) OR (te lai)) ky trang xa hoi. hieu va ((cam tuc) OR (nam thuc)) va hanh ve va trien.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sai) OR (te lai)) ky trang xa hoi. hieu va ((cam tuc) or (nam thuc)) va hanh ve va trien".
• Adding a wildcard symbol may retrieve word variants: ((te sai) OR (te lai)) ky trang xa hoi. hieu va ((cam tuc) or (nam thuc)) va hanh ve va trien*.