Perhaps you should try some spelling variations:
phuong hinh » phuong binh, phuong linh, phuong dinh
ganh nang » anh nang, nganh nong, van nang
cao hoang » cap hoang, cau hoang, co hoang
cam hoang » cap hoang, cau hoang, pham hoang
hinh toan » tinh toan, thanh toan, trinh toan
theo chu » theo chieu, cho chu, chao chu
chu sach » cau sach, thu sach, chieu sach
toan cau » toan cao, toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo chu sach - ganh nang ((cao hoang) OR (cam hoang)) phuong hinh toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chu sach - ganh nang ((cao hoang) OR (cam hoang)) phuong hinh toan cau".
• Adding a wildcard symbol may retrieve word variants: theo chu sach - ganh nang ((cao hoang) OR (cam hoang)) phuong hinh toan cau*.