Perhaps you should try some spelling variations:
thieu sach » chieu sach, thien hach, hieu cach
trung tuan » trung thanh, trung tam, tran tuan
tung tuan » hung tuan, quang tuan, trang tuan
hung cong » nhung cong, hung cuong, phung cong
cong nang » cong ngang, cong lang, cong nong
nang phan » nang phat, nang thanh, nang quan
hieu cua » hieu qua, dieu cua, bieu cua
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: hoc ((thieu sach) or (hieu cua)) - thanh ((tung tuan) or (trung tuan)) hung cong nang phan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu sach) OR (hieu cua)) - thanh ((tung tuan) OR (trung tuan)) hung cong nang phan cau.
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu sach) or (hieu cua)) - thanh ((tung tuan) or (trung tuan)) hung cong nang phan cau*.