Perhaps you should try some spelling variations:
hanh thai » nhanh thai, hinh thai, hanh tai
va triet » va thiet, va trien, ve triet
nang cai » nang cao, nang cap, nang can
nang tai » hang tai, tang tai, sang tai
cam luc » cam xuc, cau luc
cuu tre » cua tre, cau tren, cau treo
va hanh » van hanh, va thanh, va danh
vu sach » vu bach, su sach, vu khach
hieu ve » hieu va, hieu van
luc va » duc va, tuc va, loc va
ve cam » ve cham, ve cac, va cam

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach y ((nang cai) OR (nang tai)) hoi. hieu ve cam luc va hanh thai ((cuu tre) or (va triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach y ((nang cai) OR (nang tai)) hoi. hieu ve cam luc va hanh thai ((cuu tre) OR (va triet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach y ((nang cai) OR (nang tai)) hoi. hieu ve cam luc va hanh thai ((cuu tre) or (va triet))*".