Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
qua pham » quan pham, quy pham, qua cham
va thanh » gia thanh, ban thanh, va tinh
ty nang » ky nang, ty xang, ty hang
nang ma » tang ma, sang ma, nang cao
va hanh » van hanh, va danh, ban hanh
te sach » toc sach
tu sach » thu sach, su sach, tu cach
ma hoi » mai hoi, xa hoi, ma hoa
di cua » dai cua, doi cua, de cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) or (te sach)) ty nang ma hoi. hieu qua pham duc ((va hanh) OR (va thanh)) di cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) ty nang ma hoi. hieu qua pham duc ((va hanh) OR (va thanh)) di cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (te sach)) ty nang ma hoi. hieu qua pham duc ((va hanh) OR (va thanh)) di cua triet".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (te sach)) ty nang ma hoi. hieu qua pham duc ((va hanh) OR (va thanh)) di cua triet*.