Perhaps you should try some spelling variations:
thanh trung » thanh tung
trung pham » trung phan, tung pham, trung phat
pham hoang » pham hong, phap hoan, pham cong
mot chieu » doi chieu, ho chieu
vuong dan » huong dan, tuong dan, xuong dan
doc hieu » toc thieu, hoc thieu, hoc hien
than cap » khan cap, thanh lap, thanh cac
phan cau » phan dau, phan cac, phan tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((mot chieu) or (doc hieu)) sach - thanh trung pham hoang vuong dan ((than cap) or (phan cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((mot chieu) OR (doc hieu)) sach - thanh trung pham hoang vuong dan ((than cap) OR (phan cau)).
• Adding a wildcard symbol may retrieve word variants: ((mot chieu) or (doc hieu)) sach - thanh trung pham hoang vuong dan ((than cap) or (phan cau))*.