Perhaps you should try some spelling variations:
cham trung » pham trung, pham truong, nam trung
trung nha » trung nhan, trung nhat, trong nha
qua cham » qua hai, qua cac, va cham
nha hanh » nhat hanh, nha thanh, nha lanh
va triet » va thiet, va trien, ve triet
so sach » so sanh, bo sach, co sach
cao hoa » cao hoat, cao khoa, cau hoa
ca viet » va viet, hoa viet, san viet
co viet » so viet, o viet, hoc viet
y nang » ky nang, ly nang, v nang

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach y nang cao hoa. hieu qua cham trung nha hanh vi ((va triet) or (((ca viet) OR (co viet))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach y nang cao hoa. hieu qua cham trung nha hanh vi ((va triet) OR (((ca viet) OR (co viet)))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach y nang cao hoa. hieu qua cham trung nha hanh vi ((va triet) or (((ca viet) OR (co viet))))".
• Adding a wildcard symbol may retrieve word variants: so sach y nang cao hoa. hieu qua cham trung nha hanh vi ((va triet) or (((ca viet) OR (co viet))))*.