Perhaps you should try some spelling variations:
thanh toan » thanh hoa, thanh san, tinh toan
va thanh » gia thanh, ban thanh, va tinh
dua tren » dung tren
va triet » va thiet, va trien, ve triet
vu sach » vu bach, su sach, vu khach
hieu ve » hieu va, hieu van
y nang » ky nang, ly nang, v nang
ve cam » ve cham, ve cac, va cam
cam tu » cam thu, nam tu, dam tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach y nang x ho. hieu ve cam tu va thanh toan ((dua tren) or (va triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach y nang x ho. hieu ve cam tu va thanh toan ((dua tren) OR (va triet)).
• Adding a wildcard symbol may retrieve word variants: vu sach y nang x ho. hieu ve cam tu va thanh toan ((dua tren) or (va triet))*.