Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
cua triet » cua viet, su triet, va triet
dua tren » dung tren
nang ma » tang ma, sang ma, nang cao
tan anh » tuan anh, tran anh, toan anh
ma hoi » mai hoi, xa hoi, ma hoa
ve cao » va cao, ve cac, ve co
y nang » ky nang, ly nang, v nang
ve bao » te bao, va bao
anh vi » hanh vi, anh va, anh ve

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 y nang ma hoi. hieu ((ve cao) OR (ve bao)) duc tan anh vi ((dua tren) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach y nang ma hoi. hieu ((ve cao) OR (ve bao)) duc tan anh vi ((dua tren) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach y nang ma hoi. hieu ((ve cao) OR (ve bao)) duc tan anh vi ((dua tren) or (cua triet))".
• Adding a wildcard symbol may retrieve word variants: thuat sach y nang ma hoi. hieu ((ve cao) OR (ve bao)) duc tan anh vi ((dua tren) or (cua triet))*.