Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
ban hanh » ban hang
nam thuc » nam thuoc, am thuc, nam thu
thi nang » thi cong, ki nang, thi hanh
tu sach » thu sach, su sach, te sach
lang xa » lang ha, dang xay, lang van
thi lan » thi hanh, thi lien
sach o » sach lo, sac o, sach y
o lang » hoa lang, hoi lang
vi cua » vai cua, di cua
tuan » quan, tran, luan

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 o lang xa hoi. ((thi nang) or (thi lan)) nam thuc ((ban hanh) or (tuan anh)) vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach o lang xa hoi. ((thi nang) OR (thi lan)) nam thuc ((ban hanh) OR (tuan anh)) vi cua triet.
• Adding a wildcard symbol may retrieve word variants: tu sach o lang xa hoi. ((thi nang) or (thi lan)) nam thuc ((ban hanh) or (tuan anh)) vi cua triet*.