Perhaps you should try some spelling variations:
su sach » so sach, vu sach
ky sang » ky nang, ky dang, duy sang
ky tang » ky nang, ky dang, kho tang
tai hai » thi hai, dai hai, tai ha
hieu ve » hieu va, hieu van
cam luc » cam xuc, cau luc
va dinh » van dinh, va kinh, va tinh
va dan » ca dan, va dao, va dau
di cua » dai cua, doi cua, de cua
ve cam » ve cham, ve cac, va cam
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ((ky sang) OR (ky tang)) tai hai. hieu ve cam luc ((va dinh) or (va dan)) di cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((ky sang) OR (ky tang)) tai hai. hieu ve cam luc ((va dinh) OR (va dan)) di cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((ky sang) OR (ky tang)) tai hai. hieu ve cam luc ((va dinh) or (va dan)) di cua te".
• Adding a wildcard symbol may retrieve word variants: su sach ((ky sang) OR (ky tang)) tai hai. hieu ve cam luc ((va dinh) or (va dan)) di cua te*.