Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, ca tren
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
cao hoi » cau hoi, co hoi, cao hoc
va cham » va chat, va tham
dan can » dan chan, dan canh, dan ca
can cau » van cau, ban cau, ca cau
ve cam » ve cham, ve cac, va cam
tuc va » thuc va, truc va, tuc xa
va dan » ca dan, va dao, va dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ty nang cao hoi. hieu ((ve cam) or (va cham)) tuc va dan can cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang cao hoi. hieu ((ve cam) OR (va cham)) tuc va dan can cau tren.
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang cao hoi. hieu ((ve cam) or (va cham)) tuc va dan can cau tren*.