Perhaps you should try some spelling variations:
te sach » toc sach
sach ly » sach y, sach lo, sach ty
ly nang » ky nang, ly hang, ly vang
hieu ve » hieu va, hieu van
cac duc » cac du, cao duc, cac dac
ve cac » va cac, vien cac
va dan » ca dan, va dao, va dau
vi dum » vi du
vi lua » vi luu

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ly nang x ho. hieu ve cac duc va dan ((vi dum) or (vi lua)) tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ly nang x ho. hieu ve cac duc va dan ((vi dum) OR (vi lua)) tren.
• Adding a wildcard symbol may retrieve word variants: te sach ly nang x ho. hieu ve cac duc va dan ((vi dum) or (vi lua)) tren*.